Mr. Cool DIYS-12-HP-115A11-O 12,000 BTU 17.5 SEER2 Select White Wall Mounted Heat Pump System (115V) - R454B

MRCOOL® DIYS-12-HP-115A11-O DIY® Select 1st Gen 12,000 BTU 115V – R-454B Ductless Mini-Split Heat Pump System (Air Handler + Condenser)

The MRCOOL® DIYS-12-HP-115A11-O DIY® Select 1st Gen 12,000 BTU 115V ductless mini-split delivers efficient, year-round heating and cooling for spaces up to approximately 550 sq. ft. Designed as part of the innovative DIY® Select Series, this system allows homeowners to complete installation without specialized HVAC tools by utilizing the included factory pre-charged Quick Connect® line set . Featuring environmentally friendly R-454B refrigerant , the system provides dependable performance while significantly reducing Global Warming Potential (GWP) compared to previous refrigerants. 

Designed for comfort and convenience, the system includes built-in Wi-Fi for remote control through the MRCOOL® SmartHVAC (Comfort) App , allowing you to adjust temperatures, change operating modes, create schedules, and monitor energy usage from virtually anywhere. It also integrates with Amazon Alexa and Google Assistant for convenient voice control. Advanced inverter technology, multiple operating modes, and whisper-quiet performance help maintain consistent indoor comfort while reducing energy consumption.

Rated up to 17.5 SEER2 and 9.0 HSPF2-4 , the DIY® Select offers reliable efficiency for both heating and cooling applications. The outdoor condenser features a Gold Fin® corrosion-resistant coating for enhanced durability, while the included DIYPRO® communication cable simplifies electrical installation and protects wiring from moisture, pests, and weather exposure. MRCOOL® backs the system with a 1-year parts warranty , 2-year compressor warranty , and 1-year remote warranty , providing dependable long-term peace of mind.

General Information

System Type: Ductless mini-split heat pump (indoor air handler + outdoor condenser)
System Model: DIYS-12-HP-115A11-O
Indoor Model: DIY® Select 1st Gen 12,000 BTU 115V Air Handler
Outdoor Model: DIY® Select 1st Gen 12,000 BTU 115V Condenser
Capacity: 12,000 BTU Cooling / Heating
Room Size: Up to ~550 sq. ft.
Operating Modes: Heating & Cooling
Refrigerant: R-454B (eco-friendly, low GWP)
Voltage: 115V, 1 Phase, 60Hz

Key Features

• True DIY installation with factory pre-charged Quick Connect® line set

• Eco-friendly R-454B refrigerant with reduced Global Warming Potential

• Up to 17.5 SEER2 cooling efficiency

• Up to 9.0 HSPF2-4 heating efficiency

• Built-in Wi-Fi with MRCOOL® SmartHVAC app compatibility

• Compatible with Amazon Alexa and Google Assistant

• Gold Fin® corrosion-resistant outdoor coil coating

• Quiet operation with indoor sound levels as low as 17.5 dBA

• Variable-speed DC inverter compressor for improved efficiency

• DIYPRO® communication cable included for simplified installation

• Multiple comfort modes including Auto, Heat, Cool, Dry, Fan, and Sleep

• Programmable timer and scheduling

• Auto Restart after power interruptions

• Washable, reusable air filter

• Wireless remote control included

• 1-year parts warranty

• 2-year compressor warranty

• 1-year remote warranty

Specifications (Rated Conditions)

Cooling Capacity: 12,000 BTU
Heating Capacity: 12,000 BTU
SEER2: Up to 17.5
HSPF2-4: 9.0
Voltage: 115V
Coverage Area: Up to ~550 sq. ft.
Refrigerant: R-454B
Maximum Line Set Length: 75 ft.

Included Components

• DIY® Select 12,000 BTU 115V indoor air handler

• DIY® Select 12,000 BTU 115V outdoor condenser

• 11.5 ft. factory pre-charged Quick Connect® line set

• 13 ft. DIYPRO® communication cable

• Wireless remote control

• Installation accessories

Ideal For

Homeowners looking for an easy-to-install, energy-efficient ductless mini-split system for bedrooms, garages, home offices, studios, additions, workshops, and other individual spaces up to approximately 550 sq. ft. The DIY® Select Series combines true DIY installation, smart home connectivity, and dependable year-round comfort in a single high-value heating and cooling solution.